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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e702aa73297d9de14cb4eecf2d83e696133569c92f079e9434fa217883d06b4d' 
  AND token = 'wml1Z5s58qZmejrePkjvrS09RY2M0q0rtZ9IBRFgD/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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