Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc3e80eef5b7b0939b193ce11c5d6bb103b6b8290ef03fbf9c860fb084fdc9d7' 
  AND token = '97CUoKLTpYvw+wCIM+fV03V/DsIeCtld/KFCK/ILfxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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