Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '91099bfaa987ed763ad435486f3ebc304428be1a4f9519ec51d0b539b152e41d' 
  AND token = 'z6E43c8f2Sqt57FKB038d1ksq2OV961NoTaCYRtlsB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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