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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ffe1f27c72d3b4661d19fc9d446f22ca8c8d0b4cced38805879f08eb483cb7c' 
  AND token = 'IAJyr0/jd/5OkGrftpmBFtGuG6PIINf8KbM/3YY4r5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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