Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e79fa1973e5cf4cde7bab7e84145550cb9cfeed92d25cafea687e95524d0939' 
  AND token = 'OmOA9yzYoRB2P24GgllmyOfuvWKNw/RHFSEGKw30LHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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