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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f240fe86ed0694f4e64e820396b5a140644a45c2b8726f2506c5b09faab658a0' 
  AND token = 'qcyzAkZ0IsYJoKiAzxrfNtR3xJrVulRHwGIIEV0dOyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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