Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d0949727cf2ac0c12870f31e32599d764cc945408bc460ed3e77f953cfe55dd' 
  AND token = 'P1ZxDY0Ddw9nm8p4Ar0tSKmBcFC35+bzS1629nA25So=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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