Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f95411dacaf5ff47623f71ce14351bd7009697012c38212292640896a043e2da' 
  AND token = 'WoVs/JIaR1dNWTzHKZqS/RSR75pX/elHd0DFHUTLul0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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