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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '418fc49e95d8a200c6bff4dcce6ba43de2e89e6e426483614e286c28763e8aca' 
  AND token = 'Vo7rQMGD6RgAfUiIDMViNmcbh2nksT59afPuPWku09k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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