Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83cdf758d9541405e6d3928135fcad179cbce3542cffb632c42d73813ebd7d06' 
  AND token = 'NfWDv9w7qZE3O/fNJnixkrGBCU1N85mM2I0qynP8nMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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