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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea1bdc895ee2eaa4db4a58194e412f022ead170b599f18eeeeebe3c54b3f235d' 
  AND token = 'php961TlnrQbiuUll+usmZ0FQepcDe1N5kTxcEDZ4VA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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