Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'cbb94c2c19fdeb104976cc53c84d185bd1fb9fc17269eded5248ada843fbdfc3' 
  AND token = 'rUXasPf6NfusY/ylFUFJJneKm5/NIRu7c4ZyfkFVizk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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