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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9604f67e27eb67723cb2c1de06a161b3a56cce459cd80b8d72cea5799ac610bc' 
  AND token = 'Bos42npC6NZH9WUV+Ww9qAbjXWXvxRAJFVWue739Fuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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