Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15e5590800b051cd3c6ecba217950c26217a82d6e32be4888f5fa70210713661' 
  AND token = '2QIKmtEc1eLTzgvZe1Zr+/vYrlnLW9V8hmzL638H0So=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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