Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45d5c843a04b0357091c15d09e0e34179b68a7ed9306f4ea2eb1f8c5ce5b0c06' 
  AND token = 'DzdVfUr3UEIll2Yr7ZzGlHpZG2ONCY53j+GqH2l4DDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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