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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8330136ae92b0264b896df8b4693407bdcd1fd06c65c43410bea4855ce0fe093' 
  AND token = 's8axWv/Arn+LGkQV+GysLMiAaX/hOJ7DuUjnWk78vRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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