Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d59991a4c0ff175a523a4f4b45857fde22bc56883261c4b20c3fadd46b32902' 
  AND token = 'sUg18cWn5+eCViRCa0pPhyo89UXGdk3uCeMG2TyE4Dk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}