Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '515bfdea9d850c7e30c858aa78df96b5cb74c3259232e75e68764aa843c226b1' 
  AND token = 'AXr47pMyi/fVE+q3ErqC9DTkwlJiSPMhOfEJkf4aKr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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