Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0439893fac44738bd0cb7ffae74b441efbdabcfcf3076073f445736b596b3174' 
  AND token = 'n1Cl6H4FX9cstisihcfHTlMuEjDyl/otk8fqXSHPmV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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