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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9695247cecf6d50770f8dabd596fd65482b09d1407fad4ef98f08a8688b14067' 
  AND token = 'lcyD1KzGYSAMqKvWH4uXNLLf9c7B1O7W1Q43g4I19/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}