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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9223f291bbe37ce76bb2b15b0d543fe3655cea2c629ac6ea44e0a6bc4af4c166' 
  AND token = '7M9ixMB7i6CzB5QUaBwkEQXzuBEJRuvdPOBtJO0QxHo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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