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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07e253fc8e255fef26a4cd889f80f4d0da28817119d5f13adcae4a7b65f5465e' 
  AND token = '9+On4+ZurfF2U9c3+gatMMmujSptA7S7/TKZfNUg+mM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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