Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4429c8f4b73c6347e65e67d9886cfc6121eb4c6ca172f9532ba369ca234493a' 
  AND token = '30Z2JRkeDWrsR4Qsf4ScABt9OzpGKr0Puw2z9nyPjsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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