Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd16421cf5ea827e7b053a06a87393df595ba583b5405607f758f68cbdf783c58' 
  AND token = 'RaOtGES3xMAAAZ4Fth0ftFH2r9gXQ08j6oPogrEPElY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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