Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89eb4f4304a62ef629fc1f827454d652ae898e5186d9fb4fd9a9048f0ffa254e' 
  AND token = 'kCVD6DwlT8++t4T78vsovHXNFPNTEIzoIPtrl66aPok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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