Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc30c2b75d0ed835fd900776fa9f3beff073e3aeb3faff0f3609591b66d890f0' 
  AND token = 'Dxf799RVatsNNdR81bbp/fxD+/D/2PN45p13TQwYCNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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