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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '123d64f602a894b26975c5b3cc4d4abd29bdd509028c086eee69152ab46820b9' 
  AND token = 'BC5HnQcBbchB5vxDCEvvv+FR0cQhEklgFMrLiLEcFNc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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