Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f5bda98f2218647126d97590cdfde0485a9dfdef18d7eff666cc3f4dc9a9e65' 
  AND token = 'zEbtl26YGykNi6AtNyXu3l13tHZA6OEDARMiRC5YcNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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