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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60392d9cbc4e26cc4b13953d099cd88d8aaab0f0e3996c69c935d1cdc01a87a1' 
  AND token = 'npakqT0QOElCYinfXr8JcdUGx02Of9nEznLJ9TbamTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}