Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '552d3fbc858a4be768bc5196eb3d0752b3758db394c4851d616b3e19ab15f288' 
  AND token = '4COaFC41Jtm2yRhB7E4ESOGnPQX+NMuPpIbiSmE+KDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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