SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bb5d8c04c840d72bfa9f663293ca7f797bd5374846ec79acb6662c1e222edc8' 
  AND token = 'soCx8gV9ZAcxaNlzLDan+m4qn/YoNjQDQnB5RpWb1sM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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