SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77baefa664a2e1f90ccf2fba2888871c677aed96a6a513d8ed9108057e5c1030' 
  AND token = '2nqGgPIwrRLjsDgyKpO3hkZ+29PXw/carY64MchP+wU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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