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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7eefa62a0d4d2b4a7ed5c2df1c5d23f2b0ca742c0db92f4afedaae21fbff1350' 
  AND token = 'Y6RJXgxG9f+NabN40o3C8Bg2SX1d65CqFKoFcAlfMps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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