Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b25b4f24653953227547af07934d0b118bb8c6600dac17ee7f6fbff8863b9a9f' 
  AND token = 'LMH88HTy6btQ6kxW3koUTWo0xGQxzTTAImsF99DPpus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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