Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d8a1500a1555f0850e784c668f129e2e338b9ac0486ff56b2efcfe350613fac' 
  AND token = 'xMH+YfaCbV2WGGq4FRn5TiDQK0kfWAs+65vku31tcuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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