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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13c40edcc7f94ed21cd99f9397dfa6980e35960a25983b6f51b5819308cf3004' 
  AND token = '5MHOKTAvIZIPR8jSbJr4mnO1+4YW4vqq0ydHEQXnZPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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