Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96529d8ee40716b16e1681fde0d518228c576efcad7a117c1ac7bc0816b786b8' 
  AND token = 'CB9/IFhNULB19W4lCRpdfc1cbpbT5vOSvOwHwNjow5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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