Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cab5eea8016fd44fd4d118e6c753a893deb3c9fa95cf9882c0049972c04c735c' 
  AND token = '0Q3M+IgJQhD2SF09FlHu5ticJBfpFoAoXNpwGT2Czm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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