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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f58ad40a6489c354c7df960db05b1a4d3d3ac707badebd5f45bb936f996bf2ff' 
  AND token = 'Mu7EqE06NxRWhuZ0Lz5Sexgwn8um4CDWCFw+c1M7fK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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