Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '341686a9210d1f77be6999fde5dfa3bb36c50c4f6f18e8f246bf8b6e0edd8c25' 
  AND token = 'UnXhcoPP1Gr6z5n5lMvc8K+tIgpygAOarDxp/kIIr20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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