Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2184437eee13c3c15133173bb50da66851dbd70935132f2fe3f30f7e9e37d3b' 
  AND token = 'JxScB9goGAWOko5sjw52TI3LREoRNHyIOeZY57TXOb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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