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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5dc009fceed60b73fe19284b6f9a226a4065d90c6e8957313a8bd56e0541c10e' 
  AND token = 'Nizj5mh1yTi9NPvolqpBk7px+aZ6iYJMrsmPcyqohAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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