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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2929509db3b8e4a33f62ddc2baaa01372668d00d2bc147239c1f211972512fad' 
  AND token = 'BtWJkhkYIHh+7T5W0DD0vyZHzueyVnHaLcFQXZo2waY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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