Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a297d197dd017975563a770d1fa59931061b956a85b9bfd7fc104c4170da87b5' 
  AND token = 'RjDMcUV9zcPmT4ZcDffKyoALAPw3hGIA/AcQ6edc4sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00209

JSON explain

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