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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f19df0245c6da068ccd7ce1c4958c039d4f93587062a32f5c2b45b407078e3f7' 
  AND token = 'L5s9e5Vm9p8XUJsZetdW2wP/Kvp45soZ54IUsukuVeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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