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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a09ea6cab69d6ac7bb64595d044c5ddcf33b0f17b31b6c7a95e20ff7bc83c24' 
  AND token = 'lBqp7AYk9aZEXaRDLWZ0H9mnZeoyCWUWa14RbW8uQnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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