Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c459653328ad88217409b6b80aa7a0d895ba0df3a2772ff298c1c4d884e70ab' 
  AND token = 'xPV4L2aczuBNeSMoNVTU2oLNqvoGDl4XQqT1Sm9zceo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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