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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '093d0c83256480c47972417e41e3aa0185835b22791c50860736bb8df2e1df0f' 
  AND token = 'Se3rcrLt1wjNLc/oeznWmy4g+WFgZRzEbuKJOQd0ZTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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