Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '270fee95f0031ec277bef926428828e54019704c2bc7e66ff7ad38aa9242179e' 
  AND token = 'DM9hhEn0BSPgmvH0MmfJEQ3/e8+EZE/ya0oY/3vbwiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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