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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '006d9d4a129a76aa4141b3ff5e5d7f6fe5cfcae2dbaba93170fe95b9920def1c' 
  AND token = 'qX9ttLn5IJtTlDBb+VFLoM3virFm73T49yaCNRIWm+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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