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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ee226ff1c5485e8c1fd726cdd8a79c56ece3e456aa34a5a32f5dd207c8eca93' 
  AND token = 'VSZ98+oGv/jQy/5KchvUS+Q2sioECQ1dv2Y8Gu/ydb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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