Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40ff1179d0c90dc1520bb22ac16e16eedbab16704873f2e5144afba7014f02c3' 
  AND token = 'p4RL84Zc24xXzrFlksQsIl2stVPr5sz4RqBccqswG0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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