Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04946e5ce9a889a86bc737a7cc2b0d3a437e6bba7ccdbabf84c918cb6b13a244' 
  AND token = 'ibpOzznYREgcl5Opu17uH9lwWl/HEc7TMRz5wmsC+nM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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