Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d3f6c36e5938fcf1aa20d9501e112449da20f1db388d5936c4f1d6260ce2c5d' 
  AND token = 'GMea8OD5W7lcwF/mGSs9YN62OWM40NsOpnXvjDus8TQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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