Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad4245eacecc19c87d3c01d8da33e231f6056d55ea81a01c8cbee2f657395973' 
  AND token = 'Ip5xri6eEU7AsO2jpXwdQIfMaY+CewggMTIcDPtxFXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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