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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05c5ccf29036e0f4bdf4683be7e411d5c67fb2be2d0e0f6d5c45dbf89878f5d8' 
  AND token = '0Up/t7dmMeusjBOIWnVg10fpttYCr+mUZ8cxm3VSlQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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