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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22db6c706ffa980a45150d29a5b15f43b3b84ef9ab2af647baa6672996d1b5b3' 
  AND token = 'FQpgnogm5I5hnRbBDIjbXCou5hFKFwNttOha+qXsO6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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