Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86abaa51df565688692d782fe2349e816cd1960ffc582b40856c260efc552f70' 
  AND token = 'jbpGXTbt9/alkjq6bQcoMMVKYbBSDohqkaunm3UnEAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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