Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c9e1e5b767fabad5dd81901ff28fb3edcdb714fae12171852f05a6763968f4d' 
  AND token = 'SV0vpxe7ELsJtcNWmusvlJhl8KbWB1dyi+awGAF1nW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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