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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'facb3df7fa0701960119d2944c6b6efbac59eb16ccebcb6c71afca07af3f8271' 
  AND token = 'IwNQTVKnHcZm6H//Qx0H/Z/R++32q4rebpG5DaZJNJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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