Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc7b131920d5d557099a5117bdf5ea108c4e8db3f600730fa9679c8b556ec5b6' 
  AND token = 'DDBR5OeguQGtldQPBUOUc9tJu+Io9s1Ir/EEZ7rcGRw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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