Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b57ec1da97916264585f90a67c6ab957c97ff5927985e70ae94aaf51be5664af' 
  AND token = 'xWVPUjRSDkys6iFCHsR2/ket9kVXv7NknCa2wb35oXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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