SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'af181ef357023c8c32ea9172c826561d00d2ab7160af67ff1ec5303116184495' 
  AND token = 'gVbcstzbfW3AW0t/MYvnhgOFuHCZ2gI65Y9s5LoV2QI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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