Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee8f4b3b41bff99d71b2b7c83176b4a7ddd4283640121d356bba89af8f3d6f66' 
  AND token = 'qNhdqmf8Brb/pGqVi69I4sTK9/nmkqfadqz5WRXoMOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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