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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7a057fee52335e1372e5a6e2799af01a577753302cfb9f0d36a1624706bab07' 
  AND token = 'i5V15gWOZy+O+FnlXRcua9n8joh8XQtNW8JOSSQHysU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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