SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1632e127a54088bc7e4928011982197b4aa35758aadad8131d342406cf4d9fff' 
  AND token = 'QElfRL+fUZziT3gA5PLVj8FC8udhQQQXI0j/Q6vx+DM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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