Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a14940e292c64ff83f0b086e4e64d2cdddbcb45939281107c27a1b316de3753e' 
  AND token = 'E3BVhSkx43dou34WGOkSKLv+V/WQIHMBWfEnpSBISsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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